What is BMI?

Body mass index or BMI, is used to determine whether you are in an ideal weight range for your height.

It gives you an idea of whether you’re "underweight", a "healthy weight", "overweight", or "obese" for your height. BMI is one type of tool to help health professionals assess the risk for chronic disease.

BMI is a useful measurement for most people over 20 years. It is an estimate and should be considered as a rough guide only as it does not take into account age, gender, ethnicity or body composition.

BMI Calculator classification

💙 BMI of < 18.5
A BMI of less than 18.5 indicates that you are underweight, so you may need to put on some weight. You are recommended to ask your doctor or a dietitian for advice.

💚 BMI of 18.5–24.9
A BMI of 18.5–24.9 indicates that you are at a healthy weight for your height. By maintaining a healthy weight, you lower your risk of developing serious health problems.

🧡 BMI of 25–29.9
A BMI of 25–29.9 indicates that you are slightly overweight. You may be advised to lose some weight for health reasons. You are recommended to talk to your doctor or a dietitian for advice.

More information about Body Mass Index classification which is used by our BMI Calculator App is available on the website of the World Health Organization (WHO).


Now it's time to calculate your Body Mass Index. Get the free BMI Calculator App and learn more about your ideal weight range for your height. 💙💚🧡